Space Charged Limited Currents in Liquid Dielectrics
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The majority of conduction experiments in liquid dielectrics are based on the use of metal electrodes, but the metal-to-dielectric interface acts as a blocking contact, or at best a poor injector. Charge injection from metal electrodes does set in at high fields, but it occurs from microscopic asperities on the electrodes, so the emission is nonuniform. For the purpose of studying charge transport phenomena, therefore, experimental techniques are required that provide a uniform, copious source of charge carriers, and several approaches to this have been proposed: for example, Adamczewski , Freeman , Schmidt  Hummel and Allen and others have used x-rays to introduce excess carriers into dielectric liquids; Silver et al.  have shown that the tunnel junction can be used as an injecting electrode; members of the CNRS group have exploited the ion-exchange membrane as an injecting contact . LeBlanc  used a photocathode to inject electrons into hydrocarbon liquids; Hartmann and Schmidlin  used a photoconductive layer as an injecting contact, and Watson, Schneider, and Till  have used an electron beam as an ohmic contact.
KeywordsSpace Charge Virtual Cathode Liquid Dielectric Space Charge Density Space Charge Limited Current
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- 1.Adamczewski, A., Ionization, Conductivity and Breakdown in Liquid Dielectrics, Taylor and Francis, 1969.Google Scholar
- 3.Schmidt, W. F., Nonpolar Liquids Ch. 9, Photoconductivity and Related Phenomena, Eds. J. Mort and D. M. Pai, Elsevier 1976.Google Scholar
- 6.LeBlanc, O. H., Electron Drift Mobility in Liquid n-Hexane, J Chem Phys 30 (1959) 14–43.Google Scholar
- 10.See Lewis, T. J., the Electric Strength and High-Field Conductivity of Dielectric Liquids, Progress in Dielectrics, Volume 1, pp. 97–140, Eds. Birks, J. B. and Schulman, J. H., Wiley, 1959.Google Scholar
- 12.Halpern, B. and Gomer, R., Field Emission in Liquids, J Chem Phys (1969) 51, 1031–1047 and 1045–1056.Google Scholar
- 15.Schneider, J. M. and Watson, P. K., Transient Space Charge Limited Conduction in Liquid Dielectrics, 1970 Annual Report, Conf. on Electrical Ins. and Diel Phenom. (Nat. Acad. Sci. 1971 ) page 125–132.Google Scholar
- 16.Whitham, G. B., Linear and Nonlinear Waves, Wiley-Interscience, 1974.Google Scholar